Connected-bar structure



C Dec. v21 1926. Y

H. NAGIN CONNECTED BAR STRUCTURE Filed Jul'y 25. 1925 windows and forother r pressure.

@situated @sa 2l, i923.

HARRY NAGIN, F BROKLYN,

NEW YORK, Ass'GNonmo THE (marmo COMPANY os AMERICA, OF PITTSBURGH,PNNSYLVANIA, CORPORATION 0F PENNSYLVANI.

coNNEc'rED-saa STRUCTURE.

Application filed July 25, 1925. Serial No. 45,964. i'

My invention relates to a new and improved connected bar structure.

One of the objects of my invention is to provide a' structure consistingof a series of longitudinal bars and a series of cross bars, in whichthe .cross bars are connected to the longitudinal bars in a simple,reliable and eflicient manner. f

Another object of my invention consists i n making a connected barstructure of this type which is useful for gratings in sidewalks or atother points, for protecting purposes, in which the cross bars are veryrmly. andreliably connected to thelongltudinal bars without thenecessity of using rivets or expanding or enlarging the ends of thecross bars.

Other objects of my invention will be set forth-in the following ingswhich illustrate a preferred embodiment thereof, it being understoodlthat the above general statement of the objects of my invention isintended to generally illustrate the same andl not to limit it in anymanner.

Figure 1 is a section on Figure 2.

Figure embodiment of my invention.

Figure 3 'illustratesl another of my invention.

embodiment Figure 4 is a section onv the line 4-4 of` Figure 3.

VFigure 5 is, a perspective view showing one of the cross bars used inconnection with the embodiment shown in Figure 3.

Figure 6 illustrates another embodiment of my invention.

In order to make'the embodiment shown in Figures 1 and 2, thelongitudinal bars 10 which are made of any' suitable metal are providedwith slots `13 'having what may be called vertical 4portions and alsohaving inclined branches. By a. vertical slot is meant one which isperpendicular to the longitudinal edge of the respectivebarlO as myinvention is not dependent upon Iany particular position of thelongitudinal bars l0.

After the longitudinal bars 10 have been placed in proper relationship,the cross bars 11 which conform to the shapes of the vertical portionsor branches of the slots 13 are forced into the slots or recesses 13with great This pressure may be produced description and draw- 2 is atop view illustrating one by ahydraulic press or by any othersuitablemeans. his pressure causes the bottoms of the cross bars 11 toenter intoand assume the, conguration ofl the inclined inner branches of the slotsor recesses y13.

Hence, by this method of manufacture, the cross bars 11are very firmlyand reliably connected to the longitudinal bars 10 without the use ofany rivets or other fastenin -devices and without the necessity of expan05 ing or enlarging the inner ends ofthe said cross bars..

In the embodiment shown lin Figures 1 and 2, the cross bars 11 areunslotted. -In the embodiment shown in Figures 3, 4 and. 5, the Ecrossbars 11 are provided with slots or recesses 12 which may have anydesired 'depth and the longitudinal bars 10 are provided with slots 13having the same configuration as that previously described.

In this embodiment and as illustrated in Figure 4,-the cross bars 118Lare provided. withv tongues 13 which are separated from the main bodiesof the respective cross bars 11a by means of cuts or slits, so that thesaid tongues 13 can be bent to enter the' inclined branches of the slotsin the bars 10. In Fig. v5, the tongues 13 are illustrated as being bentoutwardly, to show them clearl However, when said tongues 13 are initialy 35 formed, they remain arallel to the bodyv portionsjof` theA crossars11a. When the longitudinal vbars 10 and the cross-bars 11 are assembled,said bars are caused-to engageby means of the-vertical portions of theslots 13, and the slots 12, and then, when suiiicient pressure isapplied, the tongues 13 are caused to enter the inclined portions ofslots 13a. In order to clearly illustrate this construction, the tongue13 associated with 95 the left-hand bar'11 in Fig. 3 has been omitted,but this construction is clearly shown in connection with the right-handbar 11 in said Fig.' 3. When the longitudinal bars 10 have beeninterlocked with 100 the cross-bars 11", the tops of thesaid1ongitudinal bars are -flush with the tops of said cross-bars, as shownin Fig. 4. In the embodiment shown in Figure 6, the structure resemblesthat previously illustrated in Figure 1, save that the inclined portionsof the slots 16 in the longitudinal bars 10 are 'alternately inclined inopposite directions #For example, while I vhave shown the outer' ends ofthe slots as perpendicular to'the' longitudinal edges of thelongitudinal bars,

I it would not be departing from my invencrooked slot.

tion in any manner to incline the said outer ends of the slots to saidedges at any desired angle. Similarly, if desired, the slots in thelongitudinal bars could be formed or arranged With respect to eachotherso that the cross bars could .be connected to the longitudinal bars atany desired angle.

' Thus, if in the. device shown in Figure 2, the slots corresponding -toone of the cross bars would be arranged on a line inclined (but notperpendicular) to the said cross bars,-

then asuitable and suliiciently thin cross bar could be located in saidslots, the said cross bar 'contacting with the edges of said slots.

In addition, the inclined inner ends of theslots could have any desiredshape or curvature and couldbe composed of several portions relativelyinclined to each other. Of course, as amatter of manufacturingconvenience it is desirable to use ordinary iiat strips a cross barhaving portions located in said recesses, said portions being bent tosubstantially the same configuration as the recesses,

Vthe portions of the cross'bars intermediate the recesses being integralWith the portions located in the recesses for substantially the entiredepth of the last-mentioned portions.

2.`As a new article of manufacture, a structure comprising a pluralityof girder portions having crooked recesses formed in v the longitudinaledges thereof and a cross bar fittingpinto the recesses, theportions ofthe cross bar-v which are engaged by` said recesses being integral withthe intermediate portions of said cross bar lfor substantially theirentire depth and being permanently deformed to fit ythe recesses.

3. As a new article of manufacture, a structure bars having crookedrecesses formed in the longitudinal edges thereof, and across bar havingportions fitting into said recesses, the portions of the crossv barvintermediate the recesses being `generally flat, the portions lying inthe recesses being integral with said intermediate portions-forsubstantiall)7 their Aentire depth but being crooked to cobar in place.

4. .As` a new article of manufacture, a connected bar structurecomprising a plurality of girder bars, each having' a crooked slot ofsubstantially constant Width therein, and a cross bar fitting into theslots, the portions of the cross bar lying between the slots beingsubstantially flat, and the'A portions lying in the slots being deformedto correspond with the slots and lhold the cross comprising a pluralityof girder i -operate with the slots and hold thev cross l bar inplace,the port-ions lying in the slots being integral with theintermediate poi- 4tions for substantiallyA their entire depth.

In testimony whereof I alix my' signature.

HARRY NAGIN.

